Pour 6-8 cups water into water reservoir of coffeemaker. Remove tags from teabags and place in carafe of coffeemaker. Run water through heat cycle. Shut coffeemaker off after brewing. Let steep for 1 hour. Remove and squeeze excess from bags. Pour warm tea into gallon-size pitcher. Add sugar and lemon to warm tea and stir until sugar is completely dissolved. Fill pitcher with cold water and ice to make 1 gallon. Stir and serve.